Process for repairing runners for handling molten metal
Abstract
Abstract A PATCH COMPOSITION CONSISTING ESSENTIALLY OF PARTICLES OF PITCH AND PARTICLES OF CARBON SUCH AS PARTICLES OF COKE, GRAPHITE OR COAL IS FILLED INTO THE RECESS OF THE DAMAGED PORTION OF A RUNNER TROUGH OF A BLAST FURNACE OR CUPOLA WHILE THE TROUGH IS AT A TEMPERATURE ABOVE 500*F. BUT BELOW THE CARBONIZATION TEMPERATURE OF THE PITCH, AND THEN THE PATCH IS FURTHER HEATED BY A GAS FLAME OR OTHER MEANS TO A TEMPERATURE SUFFICIENT TO CARBONIZE OF COKE THE PITCH, THIS FORMING A SOLID PATCH OF CARBON. SMALL AMOUNTS OF CALCIUM CHLORIDE, CLAYS, BENTONITE OR LIQUID PITCH MAY BE ADDED TO THE PATCH PARTICLE COMPOSITION ESPECIALLY TO RELIEVE THE DUSTING PROBLEM WHEN FINE PARTICLES OF CARBON SUCH AS 60 MESH OR FINER ARE USED.
Inventors
- 👤 Joseph R Parsons
Bibliographic Details
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